scholarly journals Malabaricane and Isomalabaricane Triterpenoids, Including Their Glycoconjugated Forms

Marine Drugs ◽  
2021 ◽  
Vol 19 (6) ◽  
pp. 327
Author(s):  
Valentin A. Stonik ◽  
Sophia A. Kolesnikova
Keyword(s):  
Biological Activity ◽  
Tumor Cells ◽  
Biological Activities ◽  
Structural Diversity ◽  
Marine Sponges ◽  
Terrestrial Plants ◽  
Taxonomic Distribution ◽  
Tricyclic Core ◽  
High Cytotoxicity ◽  
Rare Group

In this review, we discuss structural diversity, taxonomic distribution, biological activities, biogenesis, and synthesis of a rare group of terpenoids, the so-called malabaricane and isomalabaricane triterpenoids, as well as some compounds derived from them. Representatives of these groups were found in some higher and lower terrestrial plants, as well as in some fungi, and in a relatively small group of marine sponges. The skeletal systems of malabaricanes and isomalabaricanes are similar to each other, but differ principally in the stereochemistry of their tricyclic core fragments, consisting of two six-membered and one five-membered rings. Evolution of these triterpenoids provides variety of rearranged, oxidized, and glycoconjugated products. These natural compounds have attracted a lot of attention for their biosynthetic origin and biological activity, especially for their extremely high cytotoxicity against tumor cells as well as promising neuroprotective properties in nanomolar concentrations.

scholarly journals In Silico Prediction of Steroids and Triterpenoids as Potential Regulators of Lipid Metabolism

Marine Drugs ◽  
2021 ◽  
Vol 19 (11) ◽  
pp. 650
Author(s):  
Valery M. Dembitsky
Keyword(s):  
Lipid Metabolism ◽  
Marine Invertebrates ◽  
Cholesterol Metabolism ◽  
Biological Activities ◽  
Fungal Endophytes ◽  
Marine Sponges ◽  
Parkinson’S Diseases ◽  
Degree Of Certainty ◽  
High Degree ◽  
Rare Group

This review focuses on a rare group of steroids and triterpenoids that share common properties as regulators of lipid metabolism. This group of compounds is divided by the type of chemical structure, and they represent: aromatic steroids, steroid phosphate esters, highly oxygenated steroids such as steroid endoperoxides and hydroperoxides, α,β-epoxy steroids, and secosteroids. In addition, subgroups of carbon-bridged steroids, neo steroids, miscellaneous steroids, as well as synthetic steroids containing heteroatoms S (epithio steroids), Se (selena steroids), Te (tellura steroids), and At (astatosteroids) were presented. Natural steroids and triterpenoids have been found and identified from various sources such as marine sponges, soft corals, starfish, and other marine invertebrates. In addition, this group of rare lipids is found in fungi, fungal endophytes, and plants. The pharmacological profile of the presented steroids and triterpenoids was determined using the well-known computer program PASS, which is currently available online for all interested scientists and pharmacologists and is currently used by research teams from more than 130 countries of the world. Our attention has been focused on the biological activities of steroids and triterpenoids associated with the regulation of cholesterol metabolism and related processes such as anti-hyperlipoproteinemic activity, as well as the treatment of atherosclerosis, lipoprotein disorders, or inhibitors of cholesterol synthesis. In addition, individual steroids and triterpenoids were identified that demonstrated rare or unique biological activities such as treating neurodegenerative diseases, Alzheimer’s, and Parkinson’s diseases with a high degree of certainty over 95 percent. For individual steroids or triterpenoids or a group of compounds, 3D drawings of their predicted biological activities are presented.

Recent progress in andrographolide derivatization: structural modification and biological activity

2021 ◽  
Vol 21 ◽  
Author(s):  
Wang Wang ◽  
Yueying Yang ◽  
Yang Liu ◽  
Dejuan Sun ◽  
Hua Li ◽  
...  
Keyword(s):  
Biological Activity ◽  
Chemical Modification ◽  
Structural Modification ◽  
Recent Progress ◽  
Biological Activities ◽  
Structural Diversity ◽  
Traditional Chinese Medicines ◽  
Chinese Medicines ◽  
Novel Drugs ◽  
Labdane Diterpenoid

: Natural products have remarkable structural diversity and biological characteristics, providing researchers with more possibilities to develop novel drugs for disease therapeutics. Andrographolide, an ent-labdane diterpenoid from traditional Chinese medicines, Andrographis paniculata, exhibits a broad range of biological activities, which has been a hot area of research for several years. Up to now, lots of its derivatives with multiple bioactivities have been prepared through chemical modification. This review summarizes andrographolide derivatives prepared in the last ten years (2006-present), classifies them by different biological activities, and provides some discussion about the design of novel and potent derivatives.

scholarly journals Chemical Diversity and Biological Activities of Marine Sponges of the Genus Suberea: A Systematic Review

Marine Drugs ◽  
2019 ◽  
Vol 17 (2) ◽  
pp. 115 ◽  
Author(s):  
Amr El-Demerdash ◽  
Atanas G. Atanasov ◽  
Olaf K. Horbanczuk ◽  
Mohamed A. Tammam ◽  
Mamdouh Abdel-Mogib ◽  
...  
Keyword(s):  
Natural Products ◽  
Marine Natural Products ◽  
Biological Activities ◽  
Structural Diversity ◽  
Marine Sponges ◽  
Chemical Diversity ◽  
Molecular Scaffolds ◽  
Pharmacological Activities ◽  
Chemotaxonomic Markers ◽  
Novel Drug

Marine natural products (MNPs) continue to be in the spotlight in the global drug discovery endeavor. Currently, more than 30,000 structurally diverse secondary metabolites from marine sources have been isolated, making MNPs a profound, renewable source to investigate novel drug compounds. Marine sponges of the genus Suberea (family: Aplysinellidae) are recognized as producers of bromotyrosine derivatives, which are considered distinct chemotaxonomic markers for the marine sponges belonging to the order Verongida. This class of compounds exhibits structural diversity, ranging from simple monomeric molecules to more complex molecular scaffolds, displaying a myriad of biological and pharmacological potentialities. In this review, a comprehensive literature survey covering the period of 1998–2018, focusing on the chemistry and biological/pharmacological activities of marine natural products from marine sponges of the genus Suberea, with special attention to the biogenesis of the different skeletons of halogenated compounds, is presented.

scholarly journals Chemistry, Chemotaxonomy and Biological Activity of the Latrunculid Sponges (Order Poecilosclerida, Family Latrunculiidae)

Marine Drugs ◽  
2021 ◽  
Vol 19 (1) ◽  
pp. 27
Author(s):  
Fengjie Li ◽  
Michelle Kelly ◽  
Deniz Tasdemir
Keyword(s):  
Biological Activity ◽  
Biological Activities ◽  
Marine Sponges ◽  
Literature Survey ◽  
Chemical Diversity ◽  
New Drugs ◽  
Taxonomic Significance ◽  
The Family ◽  
Related Compounds ◽  
Anticancer Drug Discovery

Marine sponges are exceptionally prolific sources of natural products for the discovery and development of new drugs. Until now, sponges have contributed around 30% of all natural metabolites isolated from the marine environment. Family Latrunculiidae Topsent, 1922 (class Demospongiae Sollas, 1885, order Poecilosclerida Topsent, 1928) is a small sponge family comprising seven genera. Latrunculid sponges are recognized as the major reservoirs of diverse types of pyrroloiminoquinone-type alkaloids, with a myriad of biological activities, in particular, cytotoxicity, fuelling their exploration for anticancer drug discovery. Almost 100 pyrroloiminoquinone alkaloids and their structurally related compounds have been reported from the family Latrunculiidae. The systematics of latrunculid sponges has had a complex history, however it is now well understood. The pyrroloiminoquinone alkaloids have provided important chemotaxonomic characters for this sponge family. Latrunculid sponges have been reported to contain other types of metabolites, such as peptides (callipeltins), norditerpenes and norsesterpenes (trunculins) and macrolides (latrunculins), however, the sponges containing latrunculins and trunculins have been transferred to other sponge families. This review highlights a comprehensive literature survey spanning from the first chemical investigation of a New Zealand Latrunculia sp. in 1986 until August 2020, focusing on the chemical diversity and biological activities of secondary metabolites reported from the family Latrunculiidae. The biosynthetic (microbial) origin and the taxonomic significance of pyrroloiminoquinone related alkaloids are also discussed.

scholarly journals Biological activity and phytochemical analysis of homeopathic preparations of Viscum album L

2021 ◽  
Vol 17 (1) ◽  
pp. 25-26
Author(s):  
Carla Holandino Quaresma ◽  
João VC Batista ◽  
Michelle NO Melo ◽  
Fortune Homsani ◽  
Adriana P Oliveira ◽  
...  
Keyword(s):  
Biological Activity ◽  
Pinus Sylvestris ◽  
Tumor Cells ◽  
Biological Activities ◽  
Annexin V ◽  
Viscum Album ◽  
Host Tree ◽  
Phytochemical Analysis ◽  
Dependent Manner ◽  
Cell Proliferation Inhibition

Several in vitro and in vivo studies investigated the biological properties of mistletoe preparations [1-4]. In Europe, where phytochemical constituents of aqueous Viscum album extracts were previously described, the most widespread and common form of mistletoe is the white-berried species (Viscum album) [5]. The aim of the present study was to analyze the biological activity and phytochemical features of different Viscum album ssp mother tinctures collected in 2 different harvesting periods. Leaves, stems and berries of Viscum album samples were subjected to ethanolic extraction (45% v/v) following the homeopathic pharmacopeia [6,7]. The mother tinctures (MT) prepared were: V. album (from 3 host trees Malus domestica, Quercus sp, Ulmus sp), V. album ssp. austriacum (host tree Pinus sylvestris) and V. album ssp. abietis (host tree Abies pectinata). All samples were collected at Höfli farm (Switzerland) in July and August and subjected to chemical analysis by means of high-performance liquid chromatography-mass spectrometry (HPLC-MS/MS) and Thin-Layer Chromatography (TLC). Tumor (Yoshida and Molt4) and non-tumor cells (Ma104) were incubated with MT (1; 0.1; 0.01%) for 4, 24 and 48 hours at 37ºC. Proliferation was indirectly measured using WST-1 (tumor cells) and MTT (non-tumor cells). All cells (1.5 x 104/100 μL) were plated in triplicate in 96-well plates. The cell proliferation inhibition rate was calculated as percent inhibition relative to control cells treated with the MT solvent (45% ethanol v/v). Apoptosis/necrosis was measured using 2 x 105 cells incubated with Annexin V-FITC and 7-AAD at room temperature in the dark, and analyzed in flow cytometer [2]. Antimicrobial activity was assessed for Candida albicans, Cryptococcus neoformans, Escherichia coli and Staphylococcus aureus following the Clinical Laboratory Standards Institute manuals [8-9] and compared with 45% ethanol v/v (MT solvent). The chromatographic assays of MT samples showed phenolic acids and lignans as main chemical classes identified. WST-1 and MTT experiments revealed different antitumor potential of MT. In general, Yoshida cells were more sensitive than Molt4. The maximal cytotoxic effect with 100% of mortality was attained by incubation of Yoshida and Molt-4 cells with 1% MT of V. album ssp. abietis (harvested in July) for 4 hours. Preliminary results with non-tumor cells indicate lower cytotoxicity compared to tumor cells. Annexin V/7ADD showed predominance of late apoptotic/necrotic events after 4 and 24 hours of incubation with all MT. The antimicrobial assay showed that MT of Viscum album ssp. austriacum (host tree Pinus sylvestris) exhibited minimum inhibitory concentration 7.25 mg/mL for the 2 tested bacterial strains. The results of the present study suggest that Viscum album samples prepared according to the homeopathic pharmacopeia exhibit promising biological activities in a dose-dependent manner. The effects of potentiation will be assessed and compared to non-potentiated samples in future experiments. Therefore, the present study contributes with data on the main chemical components in homeopathic preparations of Viscum album, drawing attention to the relevance of extract solvent, seasonal aspects, host tree and harvested parts of plant harvested to the quality of thee mother tinctures.

Bioactive Flavonoids from Verbenaceae

2020 ◽  
Vol 17 (6) ◽  
pp. 754-766
Author(s):  
Kui-Wu Wang ◽  
Ting-Ting Zhang
Keyword(s):  
Biological Activity ◽  
Biological Activities ◽  
Structural Diversity ◽  
Plant Kingdom ◽  
Anti Oxidant ◽  
Anti Inflammatory

Flavonoids are widely distributed in the plant kingdom and possess a variety of biological activities, such as anti-oxidant, anti-inflammatory, and anti-viral activities. Due to the structural diversity and biological activity, flavonoid derivatives isolated from Verbenaceae family have received a lot of attention by the research scholars. In this paper, a total of 150 natural flavonoids isolated from Verbenaceae and their bioactivities were summarized.

Current Advances in the Biological Activity of Polysaccharides in Dendrobium with Intriguing Therapeutic Potential

2018 ◽  
Vol 25 (14) ◽  
pp. 1663-1681 ◽  
Author(s):  
Chun-Ting Lee ◽  
Heng-Chun Kuo ◽  
Yung-Hsiang Chen ◽  
Ming-Yen Tsai
Keyword(s):  
Biological Activity ◽  
Therapeutic Potential ◽  
Biological Activities ◽  
Biological Effects ◽  
Herbal Medicines ◽  
Research Field ◽  
Protective Effects ◽  
Pharmacological Effects ◽  
The Family ◽  
Anti Tumor Activity

The polysaccharides in many plants are attracting worldwide attention because of their biological activities and medical properties, such as anti-viral, anti-oxidative, antichronic inflammation, anti-hypertensive, immunomodulation, and neuron-protective effects, as well as anti-tumor activity. Denodrobium species, a genus of the family orchidaceae, have been used as herbal medicines for hundreds of years in China due to their pharmacological effects. These effects include nourishing the Yin, supplementing the stomach, increasing body fluids, and clearing heat. Recently, numerous researchers have investigated possible active compounds in Denodrobium species, such as lectins, phenanthrenes, alkaloids, trigonopol A, and polysaccharides. Unlike those of other plants, the biological effects of polysaccharides in Dendrobium are a novel research field. In this review, we focus on these novel findings to give readers an overall picture of the intriguing therapeutic potential of polysaccharides in Dendrobium, especially those of the four commonly-used Denodrobium species: D. huoshanense, D. offininale, D. nobile, and D. chrysotoxum.

Structural and Bioactive Studies of Halogenated Constituents from Sponges

2020 ◽  
Vol 27 (14) ◽  
pp. 2335-2360 ◽  
Author(s):  
Chao Li ◽  
Dayong Shi
Keyword(s):  
Microbial Communities ◽  
Organic Compounds ◽  
Biological Activities ◽  
Marine Sponges ◽  
Nitrogen Compounds ◽  
Halogenated Organic Compounds ◽  
Bioactive Natural Products ◽  
The Past ◽  
Tyrosine Derivatives ◽  
Polyunsaturated Lipids

: Marine organisms are abundant sources of bioactive natural products. Among metabolites produced by sponges and their associated microbial communities, halogenated natural compounds accounted for an important part due to their potent biological activities. The present review updates and compiles a total of 258 halogenated organic compounds isolated in the past three decades, especially brominated derivatives derived from 31 genera of marine sponges. These compounds can be classified as the following classes: brominated polyunsaturated lipids, nitrogen compounds, brominated tyrosine derivatives and other halogenated compounds. These substances were listed together with their source organisms, structures and bioactivities. For this purpose, 84 references were consulted.

Naphthoquinone Derivatives Isolated from Plants: Recent Advances in Biological Activity

2020 ◽  
Vol 20 (19) ◽  
pp. 2019-2035
Author(s):  
Esmaeil Sheikh Ahmadi ◽  
Amir Tajbakhsh ◽  
Milad Iranshahy ◽  
Javad Asili ◽  
Nadine Kretschmer ◽  
...  
Keyword(s):  
Clinical Trials ◽  
Biological Activity ◽  
Small Molecules ◽  
Anticancer Activity ◽  
Clinical Significance ◽  
Phase Ii ◽  
Biological Activities ◽  
Phase Ii Clinical Trials ◽  
Naturally Occurring ◽  
The Subject

Naturally occurring naphthoquinones (NQs) comprising highly reactive small molecules are the subject of increasing attention due to their promising biological activities such as antioxidant, antimicrobial, apoptosis-inducing activities, and especially anticancer activity. Lapachol, lapachone, and napabucasin belong to the NQs and are in phase II clinical trials for the treatment of many cancers. This review aims to provide a comprehensive and updated overview on the biological activities of several new NQs isolated from different species of plants reported from January 2013 to January 2020, their potential therapeutic applications and their clinical significance.

Synthesis and Biological Activity of Hydrazones and Derivatives: A Review

2020 ◽  
Vol 20 (5) ◽  
pp. 342-368 ◽  
Author(s):  
Juliana de Oliveira Carneiro Brum ◽  
Tanos Celmar Costa França ◽  
Steven R. LaPlante ◽  
José Daniel Figueroa Villar
Keyword(s):  
Biological Activity ◽  
Medicinal Chemistry ◽  
Biological Activities ◽  
New Drugs ◽  
New Drug ◽  
Cancer Inflammation

Hydrazones and their derivatives are very important compounds in medicinal chemistry due to their reported biological activity for the treatment of several diseases, like Alzheimer’s, cancer, inflammation, and leishmaniasis. However, most of the investigations on hydrazones available in literature today are directed to the synthesis of these molecules with little discussion available on their biological activities. With the purpose of bringing lights into this issue, we performed a revision of the literature and wrote this review based on some of the most current research reports of hydrazones and derivatives, making it clear that the synthesis of these molecules can lead to new drug prototypes. Our goal is to encourage more studies focused on the synthesis and evaluation of new hydrazones, as a contribution to the development of potential new drugs for the treatment of various diseases.

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